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Polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and preparation method and application thereof in 3D printing consumables

A technology of thermoplastic polyurethane and composite materials, applied in the direction of additive processing, etc., can solve problems such as agglomeration and inability to spin

Active Publication Date: 2020-07-07
XIAOGAN ESUN NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3D printing is generally divided into three categories according to different printing methods: fused deposition (FDM) printing, stereolithography (SLA) printing, selective laser sintering (SLS) printing / selective laser melting (SLM) printing, of which FDM is The most commonly used technical process, the current material using this technology is mainly polylactic acid (PLA), but PLA has its own limitations when applied to 3D printing materials
If PLA is not grafted first, TPU cannot be well compatible with PLA, and phase separation will occur, resulting in agglomeration and failure to spin.

Method used

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  • Polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and preparation method and application thereof in 3D printing consumables
  • Polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and preparation method and application thereof in 3D printing consumables
  • Polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and preparation method and application thereof in 3D printing consumables

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preparation example Construction

[0042] The invention discloses a preparation method of a polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material, which comprises the following steps:

[0043] 1) Preparation of modified polylactic acid polyol: take polyether polyol or polyglycol, lactide and the first catalyst to obtain modified polylactic acid polyol through ring-opening polymerization; wherein, the modified polylactic acid polyol Have the following general chemical structure formula;

[0044] Wherein, the polyglycol comprises polyethylene glycol or polypropylene glycol, and the polyether glycol comprises polytetrahydrofuran;

[0045] The first catalyst includes one or more of zinc compounds such as zinc powder, zinc oxide, zinc acetate, and diethyl zinc, or tin compounds such as dibutyltin dilaurate, stannous octoate, stannous chloride, and tin lactate. .

[0046] 2) Preparation of polylactic acid-based thermoplastic polyurethane: react the modified polylactic acid p...

Embodiment 1

[0068] This embodiment discloses a preparation method of polylactic acid-based thermoplastic polyurethane, which comprises the following steps:

[0069] 1) Preparation of modified polylactic acid polyol: take 130 parts of polytetrahydrofuran (number average molecular weight 650), and 270 parts of lactide are pre-dehydrated in different devolatilization kettles, and then mixed with 0.02 parts of catalyst (diethyl zinc) Mix evenly in the reactor, heat the reactor to 120-180°C and react for 3-5 hours, and then perform 1-2 hours of devolatilization treatment to obtain modified polylactic acid polyol (wherein, the number-average molecular weight of the modified polylactic acid polyol 2000).

[0070] 2) Preparation of polylactic acid-based thermoplastic polyurethane: take the modified polylactic acid polyol prepared in step 1), 1,6-hexamethylene diisocyanate and butanediol according to the molar ratio of 1:3.6:2.6, and the second catalyst (dilauric acid Dibutyltin) is injected into...

Embodiment 2～6

[0073] Examples 2-6 (changes according to the type of polyether polyol or polyglycol, and diisocyanate).

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Abstract

The invention discloses a polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material and a preparation method and application thereof in 3D printing consumables, which belong to the technical field of 3D printing. The material comprises the following raw material components in parts by mass: 60-90 parts of polylactic acid, 3 to 20 parts of polylactic acid-based thermoplastic polyurethane, 1-5 parts of an inorganic filler, 1-5 parts of a cross-linking agent, and 0.2 to 1 part of a stabilizing agent. The structural general formula of the polylactic acid-based thermoplastic polyurethane is shown in the specification, and a group R1 in the structural general formula is selected from polyalkyl ether, the group R2 is selected from one of straight-chain hexyl ormethane diphenyl, and the mesh number of the inorganic filler is 3000 to 5000 meshes. The composite material is good in 3D printing performance and high in printing precision.

Description

technical field [0001] The invention relates to a composite material, which belongs to the technical field of 3D printing, in particular to a polylactic acid-based thermoplastic polyurethane modified polylactic acid composite material, a preparation method thereof, and an application in 3D printing consumables. Background technique [0002] 3D printing technology is a high-tech technology that uses the continuous superposition of physical layers and applies related materials to implement layer-by-layer superposition to finally generate a three-dimensional entity. It does not need machining or any mold, and directly uses the computer graphics data imaging principle to generate parts of any shape, thereby greatly shortening the product development cycle, improving productivity and reducing production costs. 3D printing is generally divided into three categories according to different printing methods: fused deposition (FDM) printing, stereolithography (SLA) printing, selective...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L75/06C08K13/02C08K3/36C08K3/26C08K3/04C08G18/32C08G18/42C08G18/66C08G63/664C08G63/83B33Y70/10
CPCC08L67/04C08G63/664C08G63/83C08G18/428C08G18/664C08G18/3206B33Y70/00C08K2201/011C08K2201/005C08K2201/004C08L2207/04C08L75/06C08K13/02C08K3/36C08K3/042C08K3/26C08K3/041C08K3/04
Inventor 杨义浒周行贵陈锐袁浩刘浦
Owner XIAOGAN ESUN NEW MATERIAL
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